Convert .less files to import.less so we can use mixing,variables for theming, restructured into theme directory, bring bootstrap into core

Move client/lib to lib (one library directory instead of multiple)
Change all template less files to import.less
imports.less imports bootstrap and theme files
import.less files remain in packages until we add some kind of file detection(or meteor does)
Move bootstrap into reaction-commerce - we're always going to need it and this is easier ensure
Load fonts (font-awesome,glyphicon) from bootstrapcdn